CN2591339Y - Multistage random position mechanical lock stretching cylinder - Google Patents
Multistage random position mechanical lock stretching cylinder Download PDFInfo
- Publication number
- CN2591339Y CN2591339Y CN 02232537 CN02232537U CN2591339Y CN 2591339 Y CN2591339 Y CN 2591339Y CN 02232537 CN02232537 CN 02232537 CN 02232537 U CN02232537 U CN 02232537U CN 2591339 Y CN2591339 Y CN 2591339Y
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- tube
- screw rod
- nut
- cylinders
- steel ball
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Abstract
The utility model relates to a multistage mechanically locked telescopic cylinder in any positions, which can change rotary motion input from a screw rod end into linear displacement output from a cylinder end. Screw nuts on cylinders of all stages are respectively engaged with the same screw rod. By means of the slide of keys in a groove, the rotary motion input the screw rod is changed into the linear displacement output of the cylinders of all stages, so that large strokes can be got in a small installation space and the cylinders of all stages generate no relative rotation when telescoping. Via a lead angle less than an equivalent friction angle, the telescopic cylinders of all stages stopping in any positions can be all self-locked with high positioning accuracy. During stage exchange, the screw nut on one cylinder is engaged with the screw rod, gradually the screw nuts on two cylinders are simultaneously engaged with the screw rod, and then one screw nut is engaged but the other one is disengaged, so that the cylinders have smooth displacement and no collision. Via steel ball locks between the cylinders, linear movement of the cylinders of all stages can be mutually transferred. The cylinders have pure mechanical transmission and no pollution, so the utility model can be used in the field of mechanical transmission facilities or for replacing a multistage hydraulic cylinder.
Description
Affiliated technical field
The utility model relates to a kind of multistage arbitrary position mechanical lock telescopic cylinder, it is that a kind of energy will rotatablely move from screw rod end input positive and negative and change at different levels straight-line displacements into and stretch out or withdraw, and do not have mutually between tube and the tube and rotate, steady absence of collision when each changes grade, the flexible mechanical transmission that can machinery when stopping the what arbitrary position pins.
Background technique
The Hydraulic Power Transmission System of well-known dump truck or self-unloading cleaning cart, the employing multistage hydraulic cylinder will be equipped with the loading space lifting of load or put down, rely on loading space that hydraulic lock in the hydraulic system will be equipped with load to be locked in lifting or transfer on any angular position of process, in case the pipeline that is closed, hydraulic lock or multi-stage oil cylinder produce seepage, the loading space that load is housed will descend rapidly and vehicle frame bumps, bring unnecessary loss for loading space, vehicle frame that load is housed, the fluid that oozes out also can produce Environmental Conditions and pollute; Because collision and cylinder barrel area change are brought variation in pressure when changing grade multistage hydraulic cylinder produces mutually between, make load produce vibrations, therefore, need to slow down earlier when changing grade, quicken again after changing level, bring very inconvenient to operation.
Summary of the invention
The utility model is at there being the problems referred to above in the prior art, a kind of multistage arbitrary position mechanical lock telescopic cylinder is provided, its objective is to rotatablely move from the screw rod end of multistage arbitrary position mechanical lock telescopic cylinder input positive and negative changes at different levels straight-line displacements into and stretches out or withdraw, obtain very big stroke at less installing space, the final stroke of cylinder barrel output is barrel stroke sums at different levels, and does not have mutually between tube and the tube and rotate.
Another purpose of the present utility model is a multistage arbitrary position mechanical lock telescopic cylinder, when tube at different levels changes grade in telescopic process, tube with tin between absence of collision, can carry out the straight-line displacement transition reposefully.
It is multistage arbitrary position mechanical lock telescopic cylinder that the utility model also has a purpose, can pin by machinery when stopping the what arbitrary position in telescopic process.
The multistage arbitrary position telescopic cylinder that provides is provided the utility model above-mentioned purpose, a screw rod is equipped with at its center, sleeves at different levels are equipped with at concentric position around the screw rod, the minor diameter jacket casing is in the screw rod outside, the major diameter tube is enclosed within minor diameter tube outside again, a level cover one-level tube, outermost surface is a housing.The housing and the external world can level install, and also can be vertical installations.The interior edge face of at different levels pistons is installed the nut that can be meshed with screw rod, the spline tabling of spline on the nut boss and piston internal surface, owing to being embedded with key in the keyway on the at different levels outside piston cylinders, this key only slides along adjacent cartridges internal surface groove, and groove runs through the internal surface of the whole tube of what, and with the axis parallel of tube, again because housing is not rotate static linking to each other with the external world, therefore, the tube that links to each other with housing by key can not rotate yet, also make other each and tin between can not rotate.When driving screw rod, extraneous motor or motor (hydraulic pressure or pneumatic) or motor be rotated in the forward motion, this rotatablely move by with screw rod on the relative tube of the nut effect what of threaded engagement, owing to can not rotate between each, so under nut promotes, this tube is stretched out vertically, reached and changed rotatablely moving of screw rod end input into purpose that the straight-line displacement of tube is stretched out.Along with screw rod continues rotation, continuing to promote this tube by nut stretches out, end and another end in contact until stretching out, at this moment be installed in the steel ball of being made up of steel ball, lock tube, spring, baffle ring between the piston internal surface of nut external cylindrical surface and tube and lock, its lock tube pushes steel ball in the adjacent cylinder barrel internal surface ball-and-socket under the effect of spring force, and prop up steel ball, do not allow it overflow from ball-and-socket, making this tube and another lock is one, is referred to as tube and tube locking state.Continue under the rotation promotion at screw rod, make the nut on the former tube and the transmission of screw engages, carrying out the transition to two nuts on the tube is meshed with screw rod simultaneously and carries out transmission, carrying out the transition to a nut on the cylinder barrel again throws off from screw rod, nut on another cylinder barrel enters screw rod and is meshed with screw rod, promptly stretch out and carry out the transition to two tubes and stretch out simultaneously from a tube, carrying out the transition to another tube again continues to stretch out, reach and stretch out when changing grade absence of collision between the tube and tube, can carry out the purpose that transition is stretched out in straight-line displacement reposefully.Between tube and tube, change level and be over, under screw rod continues just changeing, promote another grade tube by the nut that is meshed with it and continue to stretch out until stretching out end of a period.Carry out the transition to the I and II tube and stretch out under steel ball locking situation according to above-mentioned stretching out by the one-level tube, carry out the transition to two working principles of stretching out through tube again, tubes at different levels can stretch out under the screw rod rotation promotes successively, stretch out until final stage and to finish, stretch out not have mutually between each in the process and rotate, making the final stroke of multistage arbitrary position mechanical lock telescopic cylinder output is barrel stroke summations at different levels.
When extraneous motor or motor or the counterrotating of motor drive screw rod, make the nut that is meshed with screw rod press to baffle ring, and the cylinder barrel that is threaded with baffle ring is withdrawn, meanwhile the boss on the nut is also pressed to lock tube, lock tube is deviate from from the steel ball bottom, and Teng has gone out space, steel ball whereabouts, and steel ball just slips in its respective pistons groove, make this tube and another disengagement, be referred to as tube and tube released state.Continue under the counter-rotating at screw rod, this tube continues withdrawal, make the transmission that is meshed with screw rod of nut on this carry out the transition to two nuts on the tube and be meshed with screw rod simultaneously and carry out transmission, the nut and the screw rod that carry out the transition on this are thrown off again, and another upper cap nut enters screw rod and is meshed with screw rod, promptly from a tube withdrawal, carrying out the transition to two tubes withdraws simultaneously, carry out the transition to another continuation withdrawal again, absence of collision between tube and the tube when reaching withdrawal and changing grade can be carried out the straight-line displacement transition of withdrawing reposefully.Continue under the counter-rotating at screw rod, according to above-mentioned withdrawal working principle, tubes at different levels are withdrawn successively by the reverse program that stretches out, be withdrawn into the end until the tube that stretches out at first, reach screw rod is imported the purpose that the counterrotating campaign changes at different levels straight-line displacement withdrawals into, and can only slide mutually between each in the withdrawal process and can not rotate, it is less that its profile of the telescopic cylinder after the withdrawal takies installing space.
Tubes at different levels utilize the self-lock mechanism of screw rod and the nut lead angle in transmission process less than equivalent friction angle in telescopic process, and steel ball lock technology between tube and the tube, and reaching can mechanical purpose of pinning when stopping the what arbitrary position in the telescopic process.
The utility model beneficial effect is: the installing space that the multi-stage expansion cylinder takies after drawing in is little, can obtain very big stroke after the expansion, and its stroke is barrel stroke summations at different levels; Each stretches and can pin the Location accuracy height reliably when stopping the what arbitrary position; When cylinder barrel changed grade, absence of collision between tube and the tube made that to load in the telescopic process motion steady; Cylinder barrels at different levels do not have rotation mutually in telescopic process, antitorque commentaries on classics performance is good; Because between the tubes at different levels is that mechanical transmission is not hydraulic transmission, can produce and pollute Environmental Conditions; Prime mover can directly be connected the transmission efficiency height with the screw rod of multistage arbitrary position mechanical lock telescopic cylinder.Because there is above-mentioned advantage in multistage arbitrary position mechanical lock telescopic cylinder, therefore it is with the little stroke that again need be very big of extensive use what installing space, and flexible stop the what arbitrary position can both the mechanical transmission fields of self-locking in, and bring pollution because of the hydraulic oil seepage to Environmental Conditions for fear of multistage hydraulic cylinder and pipeline thereof, with avoid the fluid in the multistage hydraulic cylinder enclosed cavity to be subjected to variation of ambient temperature to influence its Location accuracy, so it can also be used to replacing multistage hydraulic cylinder.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified
Fig. 1 is after the tubes at different levels of multistage arbitrary position mechanical lock telescopic cylinder are received the end, the vertical section structure figure when the one-level tube begins to stretch out.
Fig. 2 is after the one-level tube of multistage arbitrary position mechanical lock telescopic cylinder reaches the end, vertical section structure figure when one-level tube and the locking of secondary tube steel ball.
Fig. 3 is after the secondary tube of multistage arbitrary position mechanical lock telescopic cylinder reaches the end, vertical section structure figure when secondary tube and three grades of tube steel ball lockings.
Fig. 4 is the secondary tube of multistage arbitrary position mechanical lock telescopic cylinder when beginning to withdraw, vertical section structure figure when secondary tube and three grades of tube steel ball releases.
Fig. 5 is the one-level tube of multistage arbitrary position mechanical lock telescopic cylinder when beginning to withdraw, vertical section structure figure when one-level tube and the release of secondary tube steel ball.
1. one-level tubes, 2. housing, 3. screw rod among the figure, 4. level Four tube, 5. three grades of tubes, 6. secondary tube, 7.8.30 steel ball, 9.24.29. lock tube, 10.21.26. spring, 11.16.22.31 nut, 12. bottoms, 13. thrust bearings, 14. dust cover, 15.33.35.37.39. dust ring, 17.20.25. baffle ring, 18.19.23.27. key, 32.34.36.38. lining, 40.41.42.43. end cap.
Embodiment
Fig. 1 receives when a back one-level tube 1 begins to stretch out for tube at different levels, drives screw rod 3 by motor or motor (hydraulic pressure or pneumatic) or motor and is rotated in the forward motion and imports from the A end, passes on the nut 31, and the left end of nut 31 and one-level tube be interior to be encircled to spline and cooperate.Because one-level tube 1, secondary tube 6, three grades of tubes 5, level Four tubes 4 are along each tube inner surface groove slide relative by the key 18.19.23.27 on each with housing 2 each other, can not rotate, again since housing 2 staticly do not change with extraneous fastening linking, so one-level tube 1 piston interior edge face to be withstood beginning by nut 31 protruding.At this moment at different levels spring 10.21.26 is in compressive state, and steel ball 30.7.8 is all in respective pistons steel ball groove.It is protruding to continue rotation promotion next stage tube 1 at screw rod 3, after one-level tube 1 reaches the end, steel ball 30 enters in the secondary tube 6 spherical ball-and-sockets, lock tube 29 enters steel ball 30 bottoms under spring 26 effects, stop steel ball 30 from ball-and-socket, to be overflowed, is one with one-level tube 1 with secondary tube 6 locks, as shown in Figure 2, is locking state.Continue under the rotation promotion at screw rod 3, it is protruding that the one-level tube 1 after the locking drives 6 beginnings of secondary tube, makes the nut 22 on the secondary tube 6 begin to enter screw rod 3 right-hand members.Along with screw rod 3 swivel nuts 22 enter screw rod 3, at this moment the I and II tube is simultaneously protruding, carrying out the transition to the upper cap nut 31 of one-level tube throws off from screw rod 3, it is overhanging that secondary tube 6 drives 1 continuation of one-level tube by steel ball 30 locks, and after secondary tube 6 reached the end, steel ball 7 entered in three grades of tubes, the 5 annular ball-and-sockets, lock tube 24 enters steel ball 7 bottoms under spring 21 effects, stop steel ball 7 from ball-and-socket, to be overflowed, secondary tube 6 and three grades of tube 5 locks are one, as shown in Figure 3.Continue under the rotation promotion at screw rod 3, it is protruding that secondary tube 6 after the locking drives three grades of tubes 5, nut 11 beginnings on three grades of tubes 5 are drawn close to screw rod 3 right-hand members, and after entering screw rod 3, two, three grades of tubes are simultaneously protruding, carry out the transition to the upper cap nut 22 of secondary tube and throw off from screw rod 3, three grades of tubes 5 are overhanging by 6 continuation of steel ball 7 lock drive secondary tubes, reach the end until three grades of tubes 5.Screw rod 3 continues just to change, and at this moment level Four tube 4 or multistage tube stretch out principle to stretch out principle with above-mentioned I and II tube be the same, and therefore, the length overall that the multi-stage expansion cylinder launches to export from the B end back is barrel stroke sums at different levels.Utilize lead angle that screw rod 3 matches with each upper cap nut 11.16.22.31 less than equivalent friction angle in expansion process, each cylinder barrel is stretched out can both self-locking when stopping the what arbitrary position.
Fig. 4 is when motor or motor or 3 counter-rotatings of motor drive screw rod, pass on the nut 22, nut 22 is moved to right vertically, the nut 22 drive lock tubes 24 that move to right move to right and throw off from steel ball 7 bottoms, vacate steel ball space, 7 whereabouts and pressure spring 21, steel ball 7 in three grades of tubes, the 5 annular ball-and-sockets is slipped in the steel ball groove of secondary tube 7 pistons, and three grades of tubes 5 are thrown off with secondary tube 6, i.e. releasing process.Secondary tube 6 after the release begins withdrawal under screw rod 3 counter-rotatings and nut 22 and baffle ring 20 drives, and by steel ball 30 locks one-level tube 1 is moved to right.Along with motor or motor or the 3 continuation counter-rotatings of motor drive screw rod, secondary tube 6 moves to right, and after drive one-level tube upper cap nut 31 entered screw rod 3 left ends, at this moment secondary tube and one-level tube were withdrawn simultaneously, carry out the transition to nut 22 and throw off fully from screw rod 3, secondary tube 6 is withdrawn into the end.Continue under the counter-rotating promotion at screw rod 3, at this moment the nut 31 drive lock tubes 29 that move to right move to right and throw off from steel ball 30 bottoms, vacate space and pressure spring 26 that steel ball 30 falls, the steel ball groove that makes steel ball 30 in the secondary tube 6 annular ball-and-sockets slip into one-level tube 1 piston is gone into, secondary tube 6 is thrown off with one-level tube 1, as shown in Figure 5.One-level tube 1 after the release continues to begin withdrawal under counter-rotating and nut 31 and baffle ring 25 drives at screw rod 3, is withdrawn into the end until one-level tube 1.Screw rod 3 continues counter-rotating, and level Four tube 4 or multistage tube withdrawal principle are the same with above-mentioned two, one-level tube withdrawal principle, so the multi-stage expansion cylinder takes up room after withdrawing less.Utilize lead angle that screw rod 3 matches with each upper cap nut 11.16.22.31 less than equivalent friction angle in the withdrawal process, can both self-locking when making each cylinder barrel withdrawal stop the what arbitrary position.
An end of screw rod 3 is only buckled thrust bearing 13 has been installed among Fig. 1, and is pressed in by dust cover 14 on the interior resonator end surface of bottom 12, axial float when preventing screw rod 3 rotations.Screw rod 3 the other ends are made up of polished rod and screw section, the nut 31 that is installed on one-level tube 1 piston is meshed with the screw section of screw rod 3, nut 22.11.16 on all the other each pistons is arranged in order the polished rod outside that is enclosed within screw rod 3, each nut inner thread does not contact with polished rod, have only when at different levels 6.5.4 stretch out or during withdrawal, the internal thread that is installed on the nut 22.11.16 on the at different levels pistons just can be meshed with screw section on the screw rod 3 and carry out transmission.Dust ring 15.33.35.37.39 is used for preventing that dust or rainwater from entering in the tubes at different levels among Fig. 1; Lining 32.34.36.38 is installed in respectively on the end cap 40.41.42.43, is used for giving respectively at different levels 1.6.5.4 cylindrical guiding; End cap 40.41.42.43 links to each other with at different levels 6.5.4 and housing 2 respectively by screw thread; Housing 2 can also can vertically be installed with the external world in the level installation.
Claims (5)
1, a kind of multistage arbitrary position mechanical lock telescopic cylinder, screw rod is equipped with at the center, concentric portion is equipped with by tube around the screw rod, nut, steel ball, lock tube, spring, baffle ring, the sleeves at different levels that key etc. are formed, the minor diameter jacket casing is in the screw rod outside, the major diameter tube is enclosed within minor diameter tube outside again, one-level jacket casing one-level tube, outermost is a housing, it is characterized in that: screw rod is made up of threaded stem and polished rod, polished rod is installed on the thrust bearing of bottom and stretches out bottom and links to each other with extraneous rotating shaft, driving screw rod is rotated in the forward or counterrotating, the nut that is meshed with threaded stem, the spline tabling of spline on its boss and piston internal surface, the key in the keyway on the outside piston cylinder, only slide along its adjacent cartridges internal surface groove, groove is through the piston internal surface of whole tube, and with the axis parallel of tube, the nut external cylindrical surface with tin the piston internal surface between by steel ball, lock tube, spring, the steel ball lock that baffle ring is formed, when sleeves at different levels change grade, rely on the screw rod forward or reverse can be with tube and a tube locking or a release.
2, according to right 1 described multistage arbitrary position mechanical lock telescopic cylinder, it is characterized in that lead angle that nut is meshed with screw rod is less than equivalent friction angle, making each cylinder barrel be retractable to the arbitrary position can be lockable, and its screw thread is regular screw threads or trapezoidal thread or buttress thread form.
3, according to right 1 described multistage arbitrary position mechanical lock telescopic cylinder, the screw thread both ends of the surface that it is characterized in that threaded stem have the guiding tapering, the length of thread engagement (LE) of threaded stem should be with the nut that is meshed the tube stroke, and this and nut while on the adjacent cartridges required Width of thread sum that is meshed with threaded stem, because the stroke of each is different and the Width of thread difference of each nut, so the length of action of threaded stem is got wherein maximum value.
4, according to right 1 described multistage arbitrary position mechanical lock telescopic cylinder, it is characterized in that the steel ball in the steel ball lock also can be a lock dog, the spring in the steel ball lock is that common helical compression spring also can be disk spring or wing spring or cluster spring.
5, according to right 1 described multistage arbitrary position mechanical lock telescopic cylinder, it is characterized in that spline and piston internal surface spline tabling on each nut boss, also can be spline on each nut the other end and the spline tabling on the baffle ring endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232537 CN2591339Y (en) | 2002-04-16 | 2002-04-16 | Multistage random position mechanical lock stretching cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232537 CN2591339Y (en) | 2002-04-16 | 2002-04-16 | Multistage random position mechanical lock stretching cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591339Y true CN2591339Y (en) | 2003-12-10 |
Family
ID=33707901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02232537 Expired - Fee Related CN2591339Y (en) | 2002-04-16 | 2002-04-16 | Multistage random position mechanical lock stretching cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2591339Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587722A (en) * | 2016-03-09 | 2016-05-18 | 崔鲁彬 | Telescopic section tubes of electric screw tube |
| CN106628911A (en) * | 2017-01-17 | 2017-05-10 | 中山市奥斯精工机械科技有限公司 | Meal providing interception device applied to automatic meal delivering system and automatic meal delivering system |
| CN106955207A (en) * | 2017-03-22 | 2017-07-18 | 天津理工大学 | Shifting machine for handicapped person |
| CN107120335B (en) * | 2017-02-15 | 2018-07-06 | 宁波中天海德液压有限公司 | Hydraulic cylinder |
| CN110477765A (en) * | 2019-08-20 | 2019-11-22 | 广东万和电气有限公司 | A kind of automatic baking tray device and embedded-type electric steaming and baking box |
| CN111102268A (en) * | 2019-12-30 | 2020-05-05 | 宁波文泽机电技术开发有限公司 | Oil cylinder |
-
2002
- 2002-04-16 CN CN 02232537 patent/CN2591339Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587722A (en) * | 2016-03-09 | 2016-05-18 | 崔鲁彬 | Telescopic section tubes of electric screw tube |
| CN106628911A (en) * | 2017-01-17 | 2017-05-10 | 中山市奥斯精工机械科技有限公司 | Meal providing interception device applied to automatic meal delivering system and automatic meal delivering system |
| CN107120335B (en) * | 2017-02-15 | 2018-07-06 | 宁波中天海德液压有限公司 | Hydraulic cylinder |
| CN106955207A (en) * | 2017-03-22 | 2017-07-18 | 天津理工大学 | Shifting machine for handicapped person |
| CN110477765A (en) * | 2019-08-20 | 2019-11-22 | 广东万和电气有限公司 | A kind of automatic baking tray device and embedded-type electric steaming and baking box |
| CN111102268A (en) * | 2019-12-30 | 2020-05-05 | 宁波文泽机电技术开发有限公司 | Oil cylinder |
| CN111102268B (en) * | 2019-12-30 | 2021-08-27 | 山东金利液压科技有限公司 | Oil cylinder |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Gu Yang Document name: Notification of Termination of Patent Right |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |